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Two competing teams of scientists search the African jungles for a secret formula.
as Jan Trevor
as Mona Andrews
as Borno
as Dr. Harry Trevor
as Dr. Frank Bracken
as Prince Samu
as Dr. Charles Phillips
as Georgia Trevor
as Allen
as Mrs. Camerford Amster
as Henry Andrews
as Dr. Carl Neff
as Dr. Carl Neff
as Jan Trevor as a Boy
as Gen. Tichak
as Emperor Mena
as Navigator (archive footage)
as Dr. Pierce
as Speaker at Conference
as Guard of Mu
as Doctor at Conference
as Freighter Captain
as Grubb, Freighter's Mate
as Emperor's Guard / Mu Sentry
as Batu
as Lancer Officer-in-Charge
as Mrs. Henry Andrews
as Kutu
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